Various ways, flipmap is one way, another is to use a flipeffect that changes the type of room using "Room. Set the <&>room as (E)type of room", which you can make multiple things happen to that room but that's more for NGLE.

By the way, the tutorial subforum isn't for asking questions, this needs to be moved by a mod to either its own thread or merged with the open trle/ngle questions thread.